package com.sias.questionservice.controller;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.google.gson.Gson;
import com.sias.common.annotation.AuthCheck;
import com.sias.common.common.BaseResponse;
import com.sias.common.common.DeleteRequest;
import com.sias.common.common.ErrorCode;
import com.sias.common.common.ResultUtils;
import com.sias.common.constant.UserConstant;
import com.sias.common.exception.BusinessException;
import com.sias.common.exception.ThrowUtils;
import com.sias.model.model.dto.question.*;
import com.sias.model.model.dto.questionsubmit.QuestionSubmitAddRequest;
import com.sias.model.model.dto.questionsubmit.QuestionSubmitQueryRequest;
import com.sias.model.model.entity.Question;
import com.sias.model.model.entity.QuestionSubmit;
import com.sias.model.model.entity.User;
import com.sias.model.model.vo.QuestionSubmitVO;
import com.sias.model.model.vo.QuestionVO;
import com.sias.questionservice.service.QuestionService;
import com.sias.questionservice.service.QuestionSubmitService;
import com.sias.serviceclient.service.UserFeignClient;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.List;

/**
 * 帖子接口
 *
 * @author <a href="https://github.com/sogra">程序员sogra</a>
 */
@RestController
@RequestMapping("/")
@Slf4j
public class QuestionController {

  private final static Gson GSON = new Gson();

  @Resource
  private QuestionService questionService;

  @Resource
  private UserFeignClient userFeignClient;
  @Resource
  private QuestionSubmitService questionSubmitService;

  /**
   * 创建
   *
   * @param questionAddRequest
   * @param request
   * @return
   */
  @PostMapping("/add")
  public BaseResponse<Long> addQuestion(@RequestBody QuestionAddRequest questionAddRequest, HttpServletRequest request) {
    if (questionAddRequest == null) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    Question question = new Question();
    BeanUtils.copyProperties(questionAddRequest, question);
    List<String> tags = questionAddRequest.getTags();
    if (tags != null) {
      question.setTags(GSON.toJson(tags));
    }
    List<JudgeCase> judgeCase = questionAddRequest.getJudgeCase();
    if (judgeCase != null) {
      question.setJudgeCase(GSON.toJson(judgeCase));
    }
    JudgeConfig judgeConfig = questionAddRequest.getJudgeConfig();
    if (judgeConfig != null) {
      question.setJudgeConfig(GSON.toJson(judgeConfig));
    }
    questionService.validQuestion(question, true);
    User loginUser = userFeignClient.getLoginUser(request);
    question.setUserId(loginUser.getId());
    question.setFavourNum(0);
    question.setThumbNum(0);
    boolean result = questionService.save(question);
    ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
    long newQuestionId = question.getId();
    return ResultUtils.success(newQuestionId);
  }

  /**
   * 删除
   *
   * @param deleteRequest
   * @param request
   * @return
   */
  @PostMapping("/delete")
  public BaseResponse<Boolean> deleteQuestion(@RequestBody DeleteRequest deleteRequest, HttpServletRequest request) {
    if (deleteRequest == null || deleteRequest.getId() <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    User user = userFeignClient.getLoginUser(request);
    long id = deleteRequest.getId();
    // 判断是否存在
    Question oldQuestion = questionService.getById(id);
    ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
    // 仅本人或管理员可删除
    if (!oldQuestion.getUserId().equals(user.getId()) && !userFeignClient.isAdmin(request)) {
      throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
    }
    boolean b = questionService.removeById(id);
    return ResultUtils.success(b);
  }

  /**
   * 更新（仅管理员）
   *
   * @param questionUpdateRequest
   * @return
   */
  @PostMapping("/update")
  @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
  public BaseResponse<Boolean> updateQuestion(@RequestBody QuestionUpdateRequest questionUpdateRequest) {
    if (questionUpdateRequest == null || questionUpdateRequest.getId() <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    Question question = new Question();
    BeanUtils.copyProperties(questionUpdateRequest, question);
    List<String> tags = questionUpdateRequest.getTags();
    if (tags != null) {
      question.setTags(GSON.toJson(tags));
    }
    // 参数校验
    questionService.validQuestion(question, false);
    long id = questionUpdateRequest.getId();
    // 判断是否存在
    Question oldQuestion = questionService.getById(id);
    ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
    boolean result = questionService.updateById(question);
    return ResultUtils.success(result);
  }

  /**
   * 分页获取题目列表（仅管理员）
   *
   * @param questionQueryRequest
   * @param request
   * @return
   */
  @PostMapping("/list/page")
  @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
  public BaseResponse<Page<Question>> listQuestionByPage(@RequestBody QuestionQueryRequest questionQueryRequest, HttpServletRequest request) {
    long current = questionQueryRequest.getCurrent();
    long size = questionQueryRequest.getPageSize();
    Page<Question> questionPage = questionService.page(new Page<>(current, size), questionService.getQueryWrapper(questionQueryRequest));
    return ResultUtils.success(questionPage);
  }

  /**
   * 根据 id 获取
   *
   * @param id
   * @return
   */
  @GetMapping("/get")
  public BaseResponse<Question> getQuestionById(long id, HttpServletRequest request) {
    if (id <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    Question question = questionService.getById(id);
    if (question == null) {
      throw new BusinessException(ErrorCode.NOT_FOUND_ERROR);
    }
    User loginUser = userFeignClient.getLoginUser(request);
    // 不是本人或管理员，不能直接获取所有信息
    if (!question.getUserId().equals(loginUser.getId()) && !userFeignClient.isAdmin(loginUser)) {
      throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
    }
    return ResultUtils.success(question);
  }

  /**
   * 根据 id 获取
   *
   * @param id
   * @return
   */
  @GetMapping("/get/vo")
  public BaseResponse<QuestionVO> getQuestionVOById(long id, HttpServletRequest request) {
    if (id <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    Question question = questionService.getById(id);
    if (question == null) {
      throw new BusinessException(ErrorCode.NOT_FOUND_ERROR);
    }
    return ResultUtils.success(questionService.getQuestionVO(question, request));
  }

  // endregion

  /**
   * 分页获取列表（封装类）
   *
   * @param questionQueryRequest
   * @param request
   * @return
   */
  @PostMapping("/list/page/vo")
  public BaseResponse<Page<QuestionVO>> listQuestionVOByPage(@RequestBody QuestionQueryRequest questionQueryRequest, HttpServletRequest request) {
    long current = questionQueryRequest.getCurrent();
    long size = questionQueryRequest.getPageSize();
    // 限制爬虫
    ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
    Page<Question> questionPage = questionService.page(new Page<>(current, size), questionService.getQueryWrapper(questionQueryRequest));
    return ResultUtils.success(questionService.getQuestionVOPage(questionPage, request));
  }

  /**
   * 分页获取当前用户创建的资源列表
   *
   * @param questionQueryRequest
   * @param request
   * @return
   */
  @PostMapping("/my/list/page/vo")
  public BaseResponse<Page<QuestionVO>> listMyQuestionVOByPage(@RequestBody QuestionQueryRequest questionQueryRequest, HttpServletRequest request) {
    if (questionQueryRequest == null) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    User loginUser = userFeignClient.getLoginUser(request);
    questionQueryRequest.setUserId(loginUser.getId());
    long current = questionQueryRequest.getCurrent();
    long size = questionQueryRequest.getPageSize();
    // 限制爬虫
    ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
    Page<Question> questionPage = questionService.page(new Page<>(current, size), questionService.getQueryWrapper(questionQueryRequest));
    return ResultUtils.success(questionService.getQuestionVOPage(questionPage, request));
  }

  /**
   * 编辑（用户）
   *
   * @param questionEditRequest
   * @param request
   * @return
   */
  @PostMapping("/edit")
  public BaseResponse<Boolean> editQuestion(@RequestBody QuestionEditRequest questionEditRequest, HttpServletRequest request) {
    if (questionEditRequest == null || questionEditRequest.getId() <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    Question question = new Question();
    BeanUtils.copyProperties(questionEditRequest, question);
    List<String> tags = questionEditRequest.getTags();
    if (tags != null) {
      question.setTags(GSON.toJson(tags));
    }
    // 参数校验
    questionService.validQuestion(question, false);
    User loginUser = userFeignClient.getLoginUser(request);
    long id = questionEditRequest.getId();
    // 判断是否存在
    Question oldQuestion = questionService.getById(id);
    ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
    // 仅本人或管理员可编辑
    if (!oldQuestion.getUserId().equals(loginUser.getId()) && !userFeignClient.isAdmin(loginUser)) {
      throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
    }
    boolean result = questionService.updateById(question);
    return ResultUtils.success(result);
  }

  /**
   * 提交题目
   *
   * @param questionSubmitAddRequest
   * @param request
   * @return 提交记录的id
   */
  @PostMapping("/question_submit")
  public BaseResponse<Long> doQuestionSubmit(@RequestBody QuestionSubmitAddRequest questionSubmitAddRequest,
                                             HttpServletRequest request) {
    if (questionSubmitAddRequest == null || questionSubmitAddRequest.getQuestionId() <= 0) {
      throw new BusinessException(ErrorCode.PARAMS_ERROR);
    }
    // 登录才能点赞
    final User loginUser = userFeignClient.getLoginUser(request);
    long result = questionSubmitService.doQuestionSubmit(questionSubmitAddRequest, loginUser);
    return ResultUtils.success(result);
  }

  /**
   * 分页获取题目提交列表（除了管理员外 普通用户只能看到非答案、提交代码等公开信息）
   *
   * @param questionSubmitQueryRequest
   * @param request
   * @return
   */
  @PostMapping("/question_submit/list/page")
  public BaseResponse<Page<QuestionSubmitVO>> listQuestionSubmitByPage(@RequestBody QuestionSubmitQueryRequest questionSubmitQueryRequest,
                                                                       HttpServletRequest request) {
    long current = questionSubmitQueryRequest.getCurrent();
    long size = questionSubmitQueryRequest.getPageSize();
    Page<QuestionSubmit> questionSubmitPage = questionSubmitService.page(new Page<>(current, size),
            questionSubmitService.getQueryWrapper(questionSubmitQueryRequest));
    final User loginUser = userFeignClient.getLoginUser(request);
    // 返回脱敏信息
    return ResultUtils.success(questionSubmitService.getQuestionSubmitVOPage(questionSubmitPage, loginUser));
  }
}

